318 pistons to bring compression up

C2ndLTpigeon said

Wanted to see if someone can point me to the correct stock type pistons to bring a 318 to the earlier 9.2 compression. I currently have a 73 core with flat tops. I see some for sale that have 4 valve reliefs are those higher compression than flat tops?

Thanks

Click to expand...

get 318 LA Block Flat top roller camshaft pistons 1986-1991 they are taller than that the low comp 318 pistons I had a 72 318 that had the pistons .100 in the hole dog of a motor.

The Roller 318 pistons will leave you at .040 in the hole with 64CC 302 Heads you will be at 9:1, i milled my 302 heads down to get me at 9:5:1 Cr using a thin head gasket.

RockAuto
SEALED POWER 526P Cast Piston Info
2 - 5/64 Groove, 1 - 3/16 Groove, 1.745 CD, Flat Head - 9.0:1 C.R., 0.9842" Pin Dia. (Only 6 Remaining) (Size: 0.030" Oversize)